I'm such a huge procrastinator when it comes to writing. It's not that I don't love it, it's just that I always have (what seems like) a thousand other things to do. (Which is really a key element of procrastination.)
Anywho, I read somewhere that instead of making yourself write for a certain amount of time every day, like, Today I'm going to write for four hours, you should give yourself a certain amount of pages to write, like, Today I'm going to write three pages.
Three pages doesn't sound like a lot, but at the end of the week it's 20 pages, and at the end of the month it's 80. The key is to make your goal easily obtainable. Three pages is totally doable. If you can't do that, you should get a new job.
One more great piece of advice is something I actually did while writing Save Karyn. Don't look back at your work and attempt to rewrite it until you're finished writing the entire book. While writing Save Karyn, as soon as I was done with a chapter, I gave it to my editor and moved on to the next. With 20 Times a Lady, on the other hand... Oy, that was a beast to write. I rewrote the first half about a dozen times before I even attempted to write the second. I made myself more miserable than anything doing it that way.
DON'T DO THAT.
Writing is really rewriting (about a thousand times) and the hardest thing to do is to initially get it all down on the page. Once you do, it's a much easier beast to tackle. You can lay it out, see where stories end and pick up again—it's much easier to get a bigger picture of the work and see its strengths and weaknesses.
Anywho, people are always asking me for advice on writing and I'm working on a third book right now so techniques are once again fresh in my mind.
NOTE: The three pages a day are double-spaced. One double-spaced page is the rough equivalent of one page in a book. Always write that way.